package com.example.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.example.common.BaseContext;
import com.example.common.R;
import com.example.etity.ShoppingCart;
import com.example.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("ShoppingCart={}",shoppingCart.toString());
        //设置用户id,指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        //查询当前菜品或者购物车是否在购物车中
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,currentId);
        if (dishId!=null){
            //添加到购物车是菜品
            lambdaQueryWrapper.eq(ShoppingCart::getDishId,dishId);
//            lambdaQueryWrapper.eq(ShoppingCart::getDishFlavor,shoppingCart.getDishFlavor());
        }else {
            //添加到购物车是套餐
            lambdaQueryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(lambdaQueryWrapper);

        if (cartServiceOne!=null){
            //如果已经存在，就在原来的基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number + 1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //不存在添加到购物车
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            boolean save = shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }

    /**
     * 查看购物车
     * @return
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车");
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        lambdaQueryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(lambdaQueryWrapper);
        return R.success(list);
    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("clean")
    public R<String> delete(){
        boolean b = shoppingCartService.removeById(BaseContext.getCurrentId());
        return R.success("清空购物车成功");
    }
}
